I've been practicing 4 - 5 note shell voicings for a while and I feel pretty confident going through some changes. The thought process when constructing chords is mostly the same with R-7-3 or R-3-7 on the lower part of the chord and then adding 5ths and extensions on top of that. But I'm having trouble when I need to read an inversion or a chord with a non chord tone below the root (Cmaj/D for example) because I can't find a systematic approach for constructing them anymore. What should be my thought process in this scenario?
(I'm using Phil DeGreg's Jazz Keyboard Harmony book as my reference.)